Cowie® PTFE Extension / Reducing Adapter 10/-~ 45/-Joints, NO-Grease/Breakage/LeakFor High Vacuum Seals of Glass 10/-~ 45/-Joints, 280℃, , PTFE 조인트 확대/축소 어댑터, 글라스 -joint 진공용 (SL21CAT00001811)